This paper describes the localization of deformation acceleration in the period prior to dynamic failure in hornblende schist rock under triaxial compression using acoustic emission (AE) monitoring. Rather than stabilize the failure process by controlling axial stress to maintain a constant rate of AE (for monitoring AE hypocenters) as in previous works [e.g., Lockner et al., 1991], we have ins...

Abstract A better understanding of the tensile performance and failure mechanism cement paste is significant in preventing rock reinforcement failure. Therefore, this paper aims to reveal a modified Portland cement: Stratabinder HS cement. To achieve objective, split test was conducted on specimens followed by simulating numerically. The results indicated that water–cement rate significantly in...

Abstract The high growth rate of the City Surabaya increases use clean water services. Regional Drinking Water Company (PDAM) Surya Sembada, as main provider in city and its surroundings needs to carry out optimal asset management maintain expected level service. In this study, an analysis condition PDAM Surabaya’s assets will be carried on a WebGIS platform that is connected database for susta...

Abstract The paper presents the results of a numerical analysis using Finite Element Method (FEM) friction issue in contact between undercut anchor head and rock during pull-out. Formation failure zone medium was analysed assuming different Coulomb coefficients conical with rock. problem is interesting as regards practical aspects mass loosening revealed significant effect coefficient on propag...

Abstract. The Köfels rockslide in the Ötztal Valley (Tyrol, Austria) represents largest known extremely rapid landslide metamorphic rock masses Alps. Although many hypotheses for trigger were discussed past, until now no scientifically proven factor has been identified. This study provides new data about (i) pre-failure and failure topography, (ii) volume porosity of sliding mass, (iii) numeric...

in order to investigate the role of multi-wall carbon nanotubes (mwcnts) on fracture mechanism of epoxy nanocomposites, a series of tensile standard specimens reinforced with different carbon nanotube contents (0, 0.3, 0.6 and 1 wt%) were produced. the fracture surfaces of the produced nanocomposites were evaluated using scanning electron microscope (sem). the results show that the surface frac...